ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1%3DCC%28%3DCC%3DC1CN%3DC%28N%29SCCCC2%3DCN%3DCN2%29Cl/file?format=sdf&get3d=True  -- C1%3DCC%28%3DCC%3DC1CN%3DC%28N%29SCCCC2%3DCN%3DCN2%29Cl could not be loaded.